package com.tscnd.core.utils; 

import javax.servlet.http.HttpServletRequest;

import org.apache.commons.lang.StringUtils;

public class TCPIPUtil {
	public static String getIp(HttpServletRequest request) {
		String ip = request.getHeader("X-Forwarded-For");
		if(StringUtils.isNotEmpty(ip) && !"unKnown".equalsIgnoreCase(ip)){
		    //多次反向代理后会有多个ip值，第一个ip才是真实ip
				int index = ip.indexOf(",");
				if(index != -1){
					return ip.substring(0,index);
				}else{
					return ip;
				}
		}
		ip = request.getHeader("X-Real-IP");
		if(StringUtils.isNotEmpty(ip) && !"unKnown".equalsIgnoreCase(ip)){
		             return ip;
		  }
		    return request.getRemoteAddr();
	}
}
